Cloth-cutting machine.



.No. 665,l67. Patented Ian. I, 190i.

|.' BLIJCK.& J. B. aunv.

CLOTH CUTTING MACHINE.

(Application filed Apr. 9. '1900.) (No Model.) 2 Sheets-Sheet l.

' Fig.1. 16

Ike Block J1 B. Gury v "UNITED STATES ATENT OFFICE.

IKE BLOCK AND JOHN B. GURY, on ST. LOUIS, MISSOURI.

CLOTH-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 665,167, dated January1, 1901.

Application filed April 9 1900. serial No. 12,080. (No model.

To all whom it may concern.-

Be it known that we, IKE BLOCK and JOHN B. GURY, citizens of the UnitedStates, residing at the city of- St. Louis, in the State of Missouri,have invented a certain new and useful Cloth-Cutting Machine, of whichthe following is such afull, clear, and exact description as will enableany one skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification.

Our invention relates to that class of clothcutting machines in which arotary cutter driven by a suitable motor cooperates with a plate adaptedto slide beneath the cloth and be guided by a suitable handle.

Our invention consists in various novel features and details ofconstruction described in the following specification and pointed outin-the claims affixed hereto.

In the accompanyingdrawings, which illustrate a cloth-cutting machinemade in accordance with our invention, Figure 1 is a side view. Fig. 2is a View of a portion of the machine, showing the grinding device inperative position. Fig. 3 is a front view of the part shown in Fig. 2.Figs. 4 and 5 are enlarged views showing details of construction. Fig. 6is an enlarged side view of a portion of the machine, the knife andparts of the casing being removed to better show the gearing. Fig. 7 isa section showing the antifriclion-bearing for the motor. Fig. 8 is asection on the line 8 8 of Fig. 6, and Fig. 9 is a section on the line 99 of Fig. 6.

Like marks of reference refer to similar parts in the several views ofthe drawings.

10 is the foot-plat.e, which is beveled from the center toward the edgesin the usual manner, so as to allow it to slide easily beneath thecloth. Carried by the foot-plate 10 is a standard 11, on which ismounted the rotary cutter 12, which cooperates with the footplate 10.Secured t0 the upper part of the standard 11 is the frame 13 ofanelectric motor. 14 is the field-coil, and 15 the armature, of saidmotor.

16 represents the brushes.

The rotary cutter .12 is driven from the armature 15 of the motor bymeans of gearing contained in the standard 11 and a gear-case The handle18, by means of which the oted to the upper part of the standard 11 bymeans of the pivot 21. The pivot 21. is held in position by means of aset-screw 22, the end of which projects into an annular groove 23, Fig.4, in the said pivot 21.

24 is a boss formed on the standard 11 and surrounding the pivot 21. Inthe boss 24 is a depression 25, which receives a spring-detent 26, whichtends to keep the bar in a horizontal position. Pivoted to the bar 20 bymeans of a screw 27 is a U-shaped frame 28. Contained in the bar 20 is acoil-spring 29, which tends to move the U-shaped frame upwardly. Looselymounted on the U shaped frame 28 are two grinding-wheels 30 and 31,which are preferably slightly conical. ends of the arms of the frame 28are connected by a bar 32, which is preferably bowed upward, as shown inFig. 3, so as to prevent its coming in contact with the edge of therotary cutter 12. Carried by the bar 32 is a ring 33, which serves as ahandle for operating the grinders 30 and 31. A, Fig. 2, represents aradius of the rotary cutter 12 passing through the center of thegrinding-wheel 30, and B represents the axis of said grinding-wheel 30.It will be obvious that if line B, representing the axis of thegrinding-wheel, was in a plane perpendicular to the plane of the cutter12 and including the axis of the cutter the grinding-wheel would simplybe rotated by friction when brought in contact with the rotary cutter 12and would have little or no cutting effeet. When the axis of the wheelis set at an angle, however, as shown in Fig. 2, the wheel will be drawnacross the bevel of the knife and have a cutting effect. the wheel willbe worn away but a comparat-ively small amount.

34 is a screw acting as an adjustable stop for limiting the movement ofthe frame28 in the direction of the plane of the cutter 12. The screw 34is adapted to come in contact with the standard 11.

35 is a screw adapted to come in contact with a lug 36 on the standard11 and act as an adjustable stop for limiting the lateral movement ofthe frame 28.

At the same time The gear-wheel 45.

38 is a horizontal spiral gear-wheel which is contained in thegear-casing 17. The gearwheel 38 is secured to a stud 39, passingthrough a cup 40, secured in the upper part of the gear-casing 17. Theshaft 41 of the vertical armature 15 is secured in the stud 39. Thegearwheel 38 is prevented from coming off the stud 39 by means of alocknnt 42, provided with threads running in the opposite direction fromthose on the interior of the gear-wheel 38. Between the lower face ofthe cup 40 and the upper face of the gear-wheel 38 are placed balls 43and between the head of the stud 39 and the cup 40 balls 44. Thehorizontal spiral gear-wheel meshes with a vertical spiral gear-wheel45, contained in the upper part of the standard 11.

46 is a boss carried by the upper part of the standard 11.

47 is a cone having a projecting portion which is screwed through theboss 46 and cooperates with a cone 48, surrounding the boss 46. Betweenthe cones 46 and 47 and the gear-wheel are placed balls 49. The cone 47is held in place by means of a screw 50. The screw 50 preferably passesentirely through the cone 47 and receives a screw 5], which holds inposition a plate 52, which protects the gear-wheel 45 from lint, dust,or the like. The vertical spiral gear-wheel 45 meshes with a secondvertical spiral gear-wheel 54, which is mounted in a manner similar tothe The gear-wheel 54 is provided with a hub 55, which receives therotary knife 12. The knife 12 is held in position by means of ascrew-threaded washer 56.

The frame 28 will be normally held in the position shown in Fig. l bymeans of the spring 29, the head of the screw 34 being held in contactwith the field-coil 14 of the magnet. If it is desired to sharpen thecutter 12, the motor is set in operation and the frame 28 forceddownwardly by means of the handle 33, the screw 34 being first set toproperly limit the downward movement of the frame. The screw 35 is nowset so as to properly limit the lateral movement of the frame, and theframe is moved laterally, so as to force the grinding-wheel 30 againstthe cutter 12. The grinding-wheel 30 is rotated by contact with thecutter 12 and by reason of its axis being set at an angle to the radiusof the cutter will produce a drawing out on the bevel of the cutter 12.As soon as the cutter has been sharpened by the wheel 30 the wheel 31 ismoved lightly against the opposite side of the cutter to remove any buror wire edge. As soon as the frame 28 is released it will move back intothe normal position. (Shown in Fig. 1.)

The gearing of our machine, while simple of construction and containinga very small number of gear-wheels, is such as to allow the weight ofthe motor to be distributed evenly on the foot-plate of the machine,thus rendering the machine easy of operation.

Having fully described our invention,what we claim as new, and desire tosecure by Letters Patent of the United States, is

1. In a cloth-cutting machine, the combination with a foot-plate, of arotary cutter cooperating therewithnneans for actuating said cutter, anda grinding-wheel arranged with its axis substantially parallel to theplane of the cutter so as to present its periphery to saidcutter, theaxis of said grinding-wheel when in operative position being arranged atan angle to a plane perpendicular to the cutter and passingthrough thecenter of the cutter and the grinding-wheel.

2. In a cloth-cutting machine, the combination with a standard, of arotary cutter, means for actuating said cutter, a frame pivotallymounted on said standard to swing in the plane of the cutter and also toswing laterally, and a pair of grinding-wheels loosely mounted on saidframe with their axes substantiall y parallel to theplane of saidcntterso as to present their peripheries to said cutter.

3. In a cloth-cutting machine, the combination with a standard, of arotary cutter, means for actuating said cutter, a frame pivotallymounted on said standard to swing in the plane of said cutter and alsotoswing laterally, and a pair of grinding-wheels loosely mounted on saidframe with their axes substantially parallel to the plane of said cutterwas to present their peripheries to said cutter, the axes of saidgrinding-wheels when in operative position being arranged at an angle toa plane perpendicular to the cutter and passing through the center ofthe cutter and the grindiug-wheels.

In testimony whereof we have hereunto set our hands and seals in thepresence of the two subscribing witnesses.

IKE BLOCK. [L. s.] .1. B. GURY. [n s.] Witnesses:

W. A. ALEXANDER, RoY GRAY,

